What do you mean by that exactly? Like, are you asking for items that'll give you a baby pokemon instead of a regular one? Example: item that'll give you Munchlax from an egg instead of Snorlax. <––Is that what you're asking for?
Sorry, I'm a little confused about the question. That's all

The only item that is related to your question is the item, light ball, if I remember the name correctly. If you make a girl Pikachu hold it and place it in the day care with a male Cherrim, you should get a Pichu that knows Volt Tackle.

This what I know as far as you question goes. I recommend going to Pokemon.com/the game mechanics on the database, or wait for someone else to answer.Other than that, I can't help you to the extent of your question. I hope this helps anyway.